1121 lines
50 KiB
Python
1121 lines
50 KiB
Python
"""
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The objectProcessor thread, of which there is only one,
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processes the network objects
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"""
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# pylint: disable=too-many-locals,too-many-return-statements
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# pylint: disable=too-many-branches,too-many-statements
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import hashlib
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import logging
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import random
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import threading
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import time
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from binascii import hexlify
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from subprocess import call # nosec
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import helper_bitcoin
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import helper_inbox
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import helper_msgcoding
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import helper_sent
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import highlevelcrypto
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import l10n
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import protocol
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import queues
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import shared
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import state
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import tr
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from addresses import (
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calculateInventoryHash, decodeAddress, decodeVarint,
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encodeAddress, encodeVarint, varintDecodeError
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)
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from bmconfigparser import BMConfigParser
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from fallback import RIPEMD160Hash
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from helper_ackPayload import genAckPayload
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from helper_sql import SqlBulkExecute, sqlExecute, sqlQuery
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from network import bmproto, knownnodes
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from network.node import Peer
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# pylint: disable=too-many-locals, too-many-return-statements, too-many-branches, too-many-statements
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logger = logging.getLogger('default')
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class objectProcessor(threading.Thread):
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"""
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The objectProcessor thread, of which there is only one, receives network
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objects (msg, broadcast, pubkey, getpubkey) from the receiveDataThreads.
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"""
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def __init__(self):
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threading.Thread.__init__(self, name="objectProcessor")
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random.seed()
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# It may be the case that the last time Bitmessage was running,
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# the user closed it before it finished processing everything in the
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# objectProcessorQueue. Assuming that Bitmessage wasn't closed
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# forcefully, it should have saved the data in the queue into the
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# objectprocessorqueue table. Let's pull it out.
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queryreturn = sqlQuery(
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'''SELECT objecttype, data FROM objectprocessorqueue''')
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for row in queryreturn:
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objectType, data = row
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queues.objectProcessorQueue.put((objectType, data))
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sqlExecute('''DELETE FROM objectprocessorqueue''')
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logger.debug(
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'Loaded %s objects from disk into the objectProcessorQueue.',
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len(queryreturn))
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self._ack_obj = bmproto.BMStringParser()
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self.successfullyDecryptMessageTimings = []
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def run(self):
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"""Process the objects from `.queues.objectProcessorQueue`"""
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while True:
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objectType, data = queues.objectProcessorQueue.get()
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self.checkackdata(data)
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try:
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if objectType == protocol.OBJECT_GETPUBKEY:
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self.processgetpubkey(data)
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elif objectType == protocol.OBJECT_PUBKEY:
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self.processpubkey(data)
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elif objectType == protocol.OBJECT_MSG:
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self.processmsg(data)
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elif objectType == protocol.OBJECT_BROADCAST:
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self.processbroadcast(data)
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elif objectType == protocol.OBJECT_ONIONPEER:
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self.processonion(data)
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# is more of a command, not an object type. Is used to get
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# this thread past the queue.get() so that it will check
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# the shutdown variable.
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elif objectType == 'checkShutdownVariable':
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pass
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else:
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if isinstance(objectType, int):
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logger.info(
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'Don\'t know how to handle object type 0x%08X',
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objectType)
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else:
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logger.info(
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'Don\'t know how to handle object type %s',
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objectType)
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except helper_msgcoding.DecompressionSizeException as e:
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logger.error(
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'The object is too big after decompression (stopped'
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' decompressing at %ib, your configured limit %ib).'
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' Ignoring',
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e.size, BMConfigParser().safeGetInt("zlib", "maxsize"))
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except varintDecodeError as e:
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logger.debug(
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'There was a problem with a varint while processing an'
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' object. Some details: %s', e)
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except Exception:
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logger.critical(
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'Critical error within objectProcessorThread: \n',
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exc_info=True)
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if state.shutdown:
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# Wait just a moment for most of the connections to close
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time.sleep(.5)
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numberOfObjectsThatWereInTheObjectProcessorQueue = 0
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with SqlBulkExecute() as sql:
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while queues.objectProcessorQueue.curSize > 0:
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objectType, data = queues.objectProcessorQueue.get()
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sql.execute(
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'INSERT INTO objectprocessorqueue VALUES (?,?)',
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objectType, data)
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numberOfObjectsThatWereInTheObjectProcessorQueue += 1
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logger.debug(
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'Saved %s objects from the objectProcessorQueue to'
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' disk. objectProcessorThread exiting.',
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numberOfObjectsThatWereInTheObjectProcessorQueue)
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state.shutdown = 2
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break
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@staticmethod
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def checkackdata(data):
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"""Checking Acknowledgement of message received or not?"""
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# pylint: disable=protected-access
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# Let's check whether this is a message acknowledgement bound for us.
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if len(data) < 32:
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return
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# bypass nonce and time, retain object type/version/stream + body
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readPosition = 16
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if data[readPosition:] in state.ackdataForWhichImWatching:
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logger.info('This object is an acknowledgement bound for me.')
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del state.ackdataForWhichImWatching[data[readPosition:]]
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sqlExecute(
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'UPDATE sent SET status=?, lastactiontime=?'
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' WHERE ackdata=?',
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'ackreceived', int(time.time()), data[readPosition:])
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queues.UISignalQueue.put((
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'updateSentItemStatusByAckdata',
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(
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data[readPosition:],
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tr._translate(
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"MainWindow",
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"Acknowledgement of the message received %1"
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).arg(l10n.formatTimestamp())
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)
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))
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else:
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logger.debug('This object is not an acknowledgement bound for me.')
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@staticmethod
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def processonion(data):
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"""Process onionpeer object"""
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readPosition = 20 # bypass the nonce, time, and object type
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length = decodeVarint(data[readPosition:readPosition + 10])[1]
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readPosition += length
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stream, length = decodeVarint(data[readPosition:readPosition + 10])
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readPosition += length
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# it seems that stream is checked in network.bmproto
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port, length = decodeVarint(data[readPosition:readPosition + 10])
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host = protocol.checkIPAddress(data[readPosition + length:])
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if not host:
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return
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peer = Peer(host, port)
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with knownnodes.knownNodesLock:
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# FIXME: adjust expirestime
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knownnodes.addKnownNode(
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stream, peer, is_self=state.ownAddresses.get(peer))
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@staticmethod
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def processgetpubkey(data):
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"""Process getpubkey object"""
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if len(data) > 200:
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logger.info(
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'getpubkey is abnormally long. Sanity check failed.'
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' Ignoring object.')
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return
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readPosition = 20 # bypass the nonce, time, and object type
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requestedAddressVersionNumber, addressVersionLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += addressVersionLength
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streamNumber, streamNumberLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += streamNumberLength
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if requestedAddressVersionNumber == 0:
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logger.debug(
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'The requestedAddressVersionNumber of the pubkey request'
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' is zero. That doesn\'t make any sense. Ignoring it.')
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return
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elif requestedAddressVersionNumber == 1:
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logger.debug(
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'The requestedAddressVersionNumber of the pubkey request'
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' is 1 which isn\'t supported anymore. Ignoring it.')
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return
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elif requestedAddressVersionNumber > 4:
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logger.debug(
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'The requestedAddressVersionNumber of the pubkey request'
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' is too high. Can\'t understand. Ignoring it.')
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return
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myAddress = ''
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if requestedAddressVersionNumber <= 3:
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requestedHash = data[readPosition:readPosition + 20]
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if len(requestedHash) != 20:
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logger.debug(
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'The length of the requested hash is not 20 bytes.'
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' Something is wrong. Ignoring.')
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return
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logger.info(
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'the hash requested in this getpubkey request is: %s',
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hexlify(requestedHash))
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# if this address hash is one of mine
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if requestedHash in shared.myAddressesByHash:
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myAddress = shared.myAddressesByHash[requestedHash]
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elif requestedAddressVersionNumber >= 4:
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requestedTag = data[readPosition:readPosition + 32]
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if len(requestedTag) != 32:
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logger.debug(
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'The length of the requested tag is not 32 bytes.'
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' Something is wrong. Ignoring.')
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return
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logger.debug(
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'the tag requested in this getpubkey request is: %s',
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hexlify(requestedTag))
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if requestedTag in shared.myAddressesByTag:
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myAddress = shared.myAddressesByTag[requestedTag]
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if myAddress == '':
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logger.info('This getpubkey request is not for any of my keys.')
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return
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if decodeAddress(myAddress)[1] != requestedAddressVersionNumber:
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logger.warning(
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'(Within the processgetpubkey function) Someone requested'
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' one of my pubkeys but the requestedAddressVersionNumber'
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' doesn\'t match my actual address version number.'
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' Ignoring.')
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return
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if decodeAddress(myAddress)[2] != streamNumber:
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logger.warning(
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'(Within the processgetpubkey function) Someone requested'
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' one of my pubkeys but the stream number on which we'
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' heard this getpubkey object doesn\'t match this'
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' address\' stream number. Ignoring.')
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return
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if BMConfigParser().safeGetBoolean(myAddress, 'chan'):
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logger.info(
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'Ignoring getpubkey request because it is for one of my'
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' chan addresses. The other party should already have'
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' the pubkey.')
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return
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lastPubkeySendTime = BMConfigParser().safeGetInt(
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myAddress, 'lastpubkeysendtime')
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# If the last time we sent our pubkey was more recent than
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# 28 days ago...
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if lastPubkeySendTime > time.time() - 2419200:
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logger.info(
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'Found getpubkey-requested-item in my list of EC hashes'
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' BUT we already sent it recently. Ignoring request.'
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' The lastPubkeySendTime is: %s', lastPubkeySendTime)
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return
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logger.info(
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'Found getpubkey-requested-hash in my list of EC hashes.'
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' Telling Worker thread to do the POW for a pubkey message'
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' and send it out.')
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if requestedAddressVersionNumber == 2:
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queues.workerQueue.put(('doPOWForMyV2Pubkey', requestedHash))
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elif requestedAddressVersionNumber == 3:
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queues.workerQueue.put(('sendOutOrStoreMyV3Pubkey', requestedHash))
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elif requestedAddressVersionNumber == 4:
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queues.workerQueue.put(('sendOutOrStoreMyV4Pubkey', myAddress))
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def processpubkey(self, data):
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"""Process a pubkey object"""
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pubkeyProcessingStartTime = time.time()
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state.numberOfPubkeysProcessed += 1
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queues.UISignalQueue.put((
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'updateNumberOfPubkeysProcessed', 'no data'))
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readPosition = 20 # bypass the nonce, time, and object type
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addressVersion, varintLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += varintLength
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streamNumber, varintLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += varintLength
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if addressVersion == 0:
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logger.debug(
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'(Within processpubkey) addressVersion of 0 doesn\'t'
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' make sense.')
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return
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if addressVersion > 4 or addressVersion == 1:
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logger.info(
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'This version of Bitmessage cannot handle version %s'
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' addresses.', addressVersion)
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return
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if addressVersion == 2:
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# sanity check. This is the minimum possible length.
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if len(data) < 146:
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logger.debug(
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'(within processpubkey) payloadLength less than 146.'
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' Sanity check failed.')
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return
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readPosition += 4
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publicSigningKey = data[readPosition:readPosition + 64]
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# Is it possible for a public key to be invalid such that trying to
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# encrypt or sign with it will cause an error? If it is, it would
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# be easiest to test them here.
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readPosition += 64
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publicEncryptionKey = data[readPosition:readPosition + 64]
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if len(publicEncryptionKey) < 64:
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logger.debug(
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'publicEncryptionKey length less than 64. Sanity check'
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' failed.')
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return
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readPosition += 64
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# The data we'll store in the pubkeys table.
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dataToStore = data[20:readPosition]
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sha = hashlib.new('sha512')
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sha.update(
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'\x04' + publicSigningKey + '\x04' + publicEncryptionKey)
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ripe = RIPEMD160Hash(sha.digest()).digest()
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if logger.isEnabledFor(logging.DEBUG):
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logger.debug(
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'within recpubkey, addressVersion: %s, streamNumber: %s'
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'\nripe %s\npublicSigningKey in hex: %s'
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'\npublicEncryptionKey in hex: %s',
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addressVersion, streamNumber, hexlify(ripe),
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hexlify(publicSigningKey), hexlify(publicEncryptionKey)
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)
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address = encodeAddress(addressVersion, streamNumber, ripe)
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queryreturn = sqlQuery(
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"SELECT usedpersonally FROM pubkeys WHERE address=?"
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" AND usedpersonally='yes'", address)
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# if this pubkey is already in our database and if we have
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# used it personally:
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if queryreturn != []:
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logger.info(
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'We HAVE used this pubkey personally. Updating time.')
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t = (address, addressVersion, dataToStore,
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int(time.time()), 'yes')
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else:
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logger.info(
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'We have NOT used this pubkey personally. Inserting'
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' in database.')
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t = (address, addressVersion, dataToStore,
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int(time.time()), 'no')
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sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
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self.possibleNewPubkey(address)
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if addressVersion == 3:
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if len(data) < 170: # sanity check.
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logger.warning(
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'(within processpubkey) payloadLength less than 170.'
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' Sanity check failed.')
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return
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readPosition += 4
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publicSigningKey = '\x04' + data[readPosition:readPosition + 64]
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readPosition += 64
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publicEncryptionKey = '\x04' + data[readPosition:readPosition + 64]
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readPosition += 64
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_, specifiedNonceTrialsPerByteLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += specifiedNonceTrialsPerByteLength
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_, specifiedPayloadLengthExtraBytesLength = decodeVarint(
|
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data[readPosition:readPosition + 10])
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readPosition += specifiedPayloadLengthExtraBytesLength
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endOfSignedDataPosition = readPosition
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# The data we'll store in the pubkeys table.
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dataToStore = data[20:readPosition]
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signatureLength, signatureLengthLength = decodeVarint(
|
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data[readPosition:readPosition + 10])
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readPosition += signatureLengthLength
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signature = data[readPosition:readPosition + signatureLength]
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if highlevelcrypto.verify(
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data[8:endOfSignedDataPosition],
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signature, hexlify(publicSigningKey)):
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logger.debug('ECDSA verify passed (within processpubkey)')
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else:
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logger.warning('ECDSA verify failed (within processpubkey)')
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return
|
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|
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sha = hashlib.new('sha512')
|
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sha.update(publicSigningKey + publicEncryptionKey)
|
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ripe = RIPEMD160Hash(sha.digest()).digest()
|
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|
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if logger.isEnabledFor(logging.DEBUG):
|
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logger.debug(
|
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'within recpubkey, addressVersion: %s, streamNumber: %s'
|
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'\nripe %s\npublicSigningKey in hex: %s'
|
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'\npublicEncryptionKey in hex: %s',
|
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addressVersion, streamNumber, hexlify(ripe),
|
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hexlify(publicSigningKey), hexlify(publicEncryptionKey)
|
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)
|
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|
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address = encodeAddress(addressVersion, streamNumber, ripe)
|
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queryreturn = sqlQuery(
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"SELECT usedpersonally FROM pubkeys WHERE address=?"
|
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" AND usedpersonally='yes'", address)
|
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# if this pubkey is already in our database and if we have
|
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# used it personally:
|
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if queryreturn != []:
|
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logger.info(
|
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'We HAVE used this pubkey personally. Updating time.')
|
|
t = (address, addressVersion, dataToStore,
|
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int(time.time()), 'yes')
|
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else:
|
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logger.info(
|
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'We have NOT used this pubkey personally. Inserting'
|
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' in database.')
|
|
t = (address, addressVersion, dataToStore,
|
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int(time.time()), 'no')
|
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sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
|
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self.possibleNewPubkey(address)
|
|
|
|
if addressVersion == 4:
|
|
if len(data) < 350: # sanity check.
|
|
logger.debug(
|
|
'(within processpubkey) payloadLength less than 350.'
|
|
' Sanity check failed.')
|
|
return
|
|
|
|
tag = data[readPosition:readPosition + 32]
|
|
if tag not in state.neededPubkeys:
|
|
logger.info(
|
|
'We don\'t need this v4 pubkey. We didn\'t ask for it.')
|
|
return
|
|
|
|
# Let us try to decrypt the pubkey
|
|
toAddress, _ = state.neededPubkeys[tag]
|
|
if protocol.decryptAndCheckPubkeyPayload(data, toAddress) == \
|
|
'successful':
|
|
# At this point we know that we have been waiting on this
|
|
# pubkey. This function will command the workerThread
|
|
# to start work on the messages that require it.
|
|
self.possibleNewPubkey(toAddress)
|
|
|
|
# Display timing data
|
|
timeRequiredToProcessPubkey = time.time(
|
|
) - pubkeyProcessingStartTime
|
|
logger.debug(
|
|
'Time required to process this pubkey: %s',
|
|
timeRequiredToProcessPubkey)
|
|
|
|
def processmsg(self, data):
|
|
"""Process a message object"""
|
|
messageProcessingStartTime = time.time()
|
|
state.numberOfMessagesProcessed += 1
|
|
queues.UISignalQueue.put((
|
|
'updateNumberOfMessagesProcessed', 'no data'))
|
|
readPosition = 20 # bypass the nonce, time, and object type
|
|
msgVersion, msgVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
if msgVersion != 1:
|
|
logger.info(
|
|
'Cannot understand message versions other than one.'
|
|
' Ignoring message.')
|
|
return
|
|
readPosition += msgVersionLength
|
|
|
|
streamNumberAsClaimedByMsg, streamNumberAsClaimedByMsgLength = \
|
|
decodeVarint(data[readPosition:readPosition + 9])
|
|
readPosition += streamNumberAsClaimedByMsgLength
|
|
inventoryHash = calculateInventoryHash(data)
|
|
initialDecryptionSuccessful = False
|
|
|
|
# This is not an acknowledgement bound for me. See if it is a message
|
|
# bound for me by trying to decrypt it with my private keys.
|
|
|
|
for key, cryptorObject in sorted(
|
|
shared.myECCryptorObjects.items(),
|
|
key=lambda x: random.random()):
|
|
try:
|
|
# continue decryption attempts to avoid timing attacks
|
|
if initialDecryptionSuccessful:
|
|
cryptorObject.decrypt(data[readPosition:])
|
|
else:
|
|
decryptedData = cryptorObject.decrypt(data[readPosition:])
|
|
# This is the RIPE hash of my pubkeys. We need this
|
|
# below to compare to the destination_ripe included
|
|
# in the encrypted data.
|
|
toRipe = key
|
|
initialDecryptionSuccessful = True
|
|
logger.info(
|
|
'EC decryption successful using key associated'
|
|
' with ripe hash: %s.', hexlify(key))
|
|
except Exception:
|
|
pass
|
|
if not initialDecryptionSuccessful:
|
|
# This is not a message bound for me.
|
|
logger.info(
|
|
'Length of time program spent failing to decrypt this'
|
|
' message: %s seconds.',
|
|
time.time() - messageProcessingStartTime)
|
|
return
|
|
|
|
# This is a message bound for me.
|
|
# Look up my address based on the RIPE hash.
|
|
toAddress = shared.myAddressesByHash[toRipe]
|
|
readPosition = 0
|
|
sendersAddressVersionNumber, sendersAddressVersionNumberLength = \
|
|
decodeVarint(decryptedData[readPosition:readPosition + 10])
|
|
readPosition += sendersAddressVersionNumberLength
|
|
if sendersAddressVersionNumber == 0:
|
|
logger.info(
|
|
'Cannot understand sendersAddressVersionNumber = 0.'
|
|
' Ignoring message.')
|
|
return
|
|
if sendersAddressVersionNumber > 4:
|
|
logger.info(
|
|
'Sender\'s address version number %s not yet supported.'
|
|
' Ignoring message.', sendersAddressVersionNumber)
|
|
return
|
|
if len(decryptedData) < 170:
|
|
logger.info(
|
|
'Length of the unencrypted data is unreasonably short.'
|
|
' Sanity check failed. Ignoring message.')
|
|
return
|
|
sendersStreamNumber, sendersStreamNumberLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
if sendersStreamNumber == 0:
|
|
logger.info('sender\'s stream number is 0. Ignoring message.')
|
|
return
|
|
readPosition += sendersStreamNumberLength
|
|
readPosition += 4
|
|
pubSigningKey = '\x04' + decryptedData[readPosition:readPosition + 64]
|
|
readPosition += 64
|
|
pubEncryptionKey = '\x04' + decryptedData[readPosition:readPosition + 64]
|
|
readPosition += 64
|
|
if sendersAddressVersionNumber >= 3:
|
|
requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = \
|
|
decodeVarint(decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.info(
|
|
'sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is %s',
|
|
requiredAverageProofOfWorkNonceTrialsPerByte)
|
|
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.info(
|
|
'sender\'s requiredPayloadLengthExtraBytes is %s',
|
|
requiredPayloadLengthExtraBytes)
|
|
# needed for when we store the pubkey in our database of pubkeys
|
|
# for later use.
|
|
endOfThePublicKeyPosition = readPosition
|
|
if toRipe != decryptedData[readPosition:readPosition + 20]:
|
|
logger.info(
|
|
'The original sender of this message did not send it to'
|
|
' you. Someone is attempting a Surreptitious Forwarding'
|
|
' Attack.\nSee: '
|
|
'http://world.std.com/~dtd/sign_encrypt/sign_encrypt7.html'
|
|
'\nyour toRipe: %s\nembedded destination toRipe: %s',
|
|
hexlify(toRipe),
|
|
hexlify(decryptedData[readPosition:readPosition + 20])
|
|
)
|
|
return
|
|
readPosition += 20
|
|
messageEncodingType, messageEncodingTypeLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += messageEncodingTypeLength
|
|
messageLength, messageLengthLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += messageLengthLength
|
|
message = decryptedData[readPosition:readPosition + messageLength]
|
|
# print 'First 150 characters of message:', repr(message[:150])
|
|
readPosition += messageLength
|
|
ackLength, ackLengthLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += ackLengthLength
|
|
ackData = decryptedData[readPosition:readPosition + ackLength]
|
|
readPosition += ackLength
|
|
# needed to mark the end of what is covered by the signature
|
|
positionOfBottomOfAckData = readPosition
|
|
signatureLength, signatureLengthLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += signatureLengthLength
|
|
signature = decryptedData[
|
|
readPosition:readPosition + signatureLength]
|
|
signedData = data[8:20] + encodeVarint(1) + encodeVarint(
|
|
streamNumberAsClaimedByMsg
|
|
) + decryptedData[:positionOfBottomOfAckData]
|
|
|
|
if not highlevelcrypto.verify(
|
|
signedData, signature, hexlify(pubSigningKey)):
|
|
logger.debug('ECDSA verify failed')
|
|
return
|
|
logger.debug('ECDSA verify passed')
|
|
if logger.isEnabledFor(logging.DEBUG):
|
|
logger.debug(
|
|
'As a matter of intellectual curiosity, here is the Bitcoin'
|
|
' address associated with the keys owned by the other person:'
|
|
' %s ..and here is the testnet address: %s. The other person'
|
|
' must take their private signing key from Bitmessage and'
|
|
' import it into Bitcoin (or a service like Blockchain.info)'
|
|
' for it to be of any use. Do not use this unless you know'
|
|
' what you are doing.',
|
|
helper_bitcoin.calculateBitcoinAddressFromPubkey(pubSigningKey),
|
|
helper_bitcoin.calculateTestnetAddressFromPubkey(pubSigningKey)
|
|
)
|
|
# Used to detect and ignore duplicate messages in our inbox
|
|
sigHash = hashlib.sha512(
|
|
hashlib.sha512(signature).digest()).digest()[32:]
|
|
|
|
# calculate the fromRipe.
|
|
sha = hashlib.new('sha512')
|
|
sha.update(pubSigningKey + pubEncryptionKey)
|
|
ripe = RIPEMD160Hash(sha.digest()).digest()
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersionNumber, sendersStreamNumber, ripe)
|
|
|
|
# Let's store the public key in case we want to reply to this
|
|
# person.
|
|
sqlExecute(
|
|
'''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
fromAddress,
|
|
sendersAddressVersionNumber,
|
|
decryptedData[:endOfThePublicKeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
|
|
# Check to see whether we happen to be awaiting this
|
|
# pubkey in order to send a message. If we are, it will do the POW
|
|
# and send it.
|
|
self.possibleNewPubkey(fromAddress)
|
|
|
|
# If this message is bound for one of my version 3 addresses (or
|
|
# higher), then we must check to make sure it meets our demanded
|
|
# proof of work requirement. If this is bound for one of my chan
|
|
# addresses then we skip this check; the minimum network POW is
|
|
# fine.
|
|
# If the toAddress version number is 3 or higher and not one of
|
|
# my chan addresses:
|
|
if decodeAddress(toAddress)[1] >= 3 \
|
|
and not BMConfigParser().safeGetBoolean(toAddress, 'chan'):
|
|
# If I'm not friendly with this person:
|
|
if not shared.isAddressInMyAddressBookSubscriptionsListOrWhitelist(
|
|
fromAddress):
|
|
requiredNonceTrialsPerByte = BMConfigParser().getint(
|
|
toAddress, 'noncetrialsperbyte')
|
|
requiredPayloadLengthExtraBytes = BMConfigParser().getint(
|
|
toAddress, 'payloadlengthextrabytes')
|
|
if not protocol.isProofOfWorkSufficient(
|
|
data, requiredNonceTrialsPerByte,
|
|
requiredPayloadLengthExtraBytes):
|
|
logger.info(
|
|
'Proof of work in msg is insufficient only because'
|
|
' it does not meet our higher requirement.')
|
|
return
|
|
# Gets set to True if the user shouldn't see the message according
|
|
# to black or white lists.
|
|
blockMessage = False
|
|
# If we are using a blacklist
|
|
if BMConfigParser().get(
|
|
'bitmessagesettings', 'blackwhitelist') == 'black':
|
|
queryreturn = sqlQuery(
|
|
"SELECT label FROM blacklist where address=? and enabled='1'",
|
|
fromAddress)
|
|
if queryreturn != []:
|
|
logger.info('Message ignored because address is in blacklist.')
|
|
|
|
blockMessage = True
|
|
else: # We're using a whitelist
|
|
queryreturn = sqlQuery(
|
|
"SELECT label FROM whitelist where address=? and enabled='1'",
|
|
fromAddress)
|
|
if queryreturn == []:
|
|
logger.info(
|
|
'Message ignored because address not in whitelist.')
|
|
blockMessage = True
|
|
|
|
toLabel = BMConfigParser().get(toAddress, 'label')
|
|
if toLabel == '':
|
|
toLabel = toAddress
|
|
|
|
try:
|
|
decodedMessage = helper_msgcoding.MsgDecode(
|
|
messageEncodingType, message)
|
|
except helper_msgcoding.MsgDecodeException:
|
|
return
|
|
subject = decodedMessage.subject
|
|
body = decodedMessage.body
|
|
|
|
# Let us make sure that we haven't already received this message
|
|
if helper_inbox.isMessageAlreadyInInbox(sigHash):
|
|
logger.info('This msg is already in our inbox. Ignoring it.')
|
|
blockMessage = True
|
|
if not blockMessage:
|
|
if messageEncodingType != 0:
|
|
t = (inventoryHash, toAddress, fromAddress, subject,
|
|
int(time.time()), body, 'inbox', messageEncodingType,
|
|
0, sigHash)
|
|
helper_inbox.insert(t)
|
|
|
|
queues.UISignalQueue.put(('displayNewInboxMessage', (
|
|
inventoryHash, toAddress, fromAddress, subject, body)))
|
|
|
|
# If we are behaving as an API then we might need to run an
|
|
# outside command to let some program know that a new message
|
|
# has arrived.
|
|
if BMConfigParser().safeGetBoolean(
|
|
'bitmessagesettings', 'apienabled'):
|
|
try:
|
|
apiNotifyPath = BMConfigParser().get(
|
|
'bitmessagesettings', 'apinotifypath')
|
|
except:
|
|
apiNotifyPath = ''
|
|
if apiNotifyPath != '':
|
|
call([apiNotifyPath, "newMessage"])
|
|
|
|
# Let us now check and see whether our receiving address is
|
|
# behaving as a mailing list
|
|
if BMConfigParser().safeGetBoolean(toAddress, 'mailinglist') \
|
|
and messageEncodingType != 0:
|
|
try:
|
|
mailingListName = BMConfigParser().get(
|
|
toAddress, 'mailinglistname')
|
|
except:
|
|
mailingListName = ''
|
|
# Let us send out this message as a broadcast
|
|
subject = self.addMailingListNameToSubject(
|
|
subject, mailingListName)
|
|
# Let us now send this message out as a broadcast
|
|
message = time.strftime(
|
|
"%a, %Y-%m-%d %H:%M:%S UTC", time.gmtime()
|
|
) + ' Message ostensibly from ' + fromAddress \
|
|
+ ':\n\n' + body
|
|
# The fromAddress for the broadcast that we are about to
|
|
# send is the toAddress (my address) for the msg message
|
|
# we are currently processing.
|
|
fromAddress = toAddress
|
|
# We don't actually need the ackdata for acknowledgement
|
|
# since this is a broadcast message but we can use it to
|
|
# update the user interface when the POW is done generating.
|
|
toAddress = '[Broadcast subscribers]'
|
|
|
|
helper_sent.insert(
|
|
fromAddress=fromAddress,
|
|
status='broadcastqueued',
|
|
subject=subject,
|
|
message=message,
|
|
encoding=messageEncodingType)
|
|
|
|
queues.UISignalQueue.put((
|
|
'displayNewSentMessage', (
|
|
toAddress, '[Broadcast subscribers]', fromAddress,
|
|
subject, message, ackdata)
|
|
))
|
|
queues.workerQueue.put(('sendbroadcast', ''))
|
|
|
|
# Don't send ACK if invalid, blacklisted senders, invisible
|
|
# messages, disabled or chan
|
|
if (
|
|
self.ackDataHasAValidHeader(ackData) and not blockMessage and
|
|
messageEncodingType != 0 and
|
|
not BMConfigParser().safeGetBoolean(toAddress, 'dontsendack') and
|
|
not BMConfigParser().safeGetBoolean(toAddress, 'chan')
|
|
):
|
|
self._ack_obj.send_data(ackData[24:])
|
|
|
|
# Display timing data
|
|
timeRequiredToAttemptToDecryptMessage = time.time(
|
|
) - messageProcessingStartTime
|
|
self.successfullyDecryptMessageTimings.append(
|
|
timeRequiredToAttemptToDecryptMessage)
|
|
timing_sum = 0
|
|
for item in self.successfullyDecryptMessageTimings:
|
|
timing_sum += item
|
|
logger.debug(
|
|
'Time to decrypt this message successfully: %s'
|
|
'\nAverage time for all message decryption successes since'
|
|
' startup: %s.',
|
|
timeRequiredToAttemptToDecryptMessage,
|
|
timing_sum / len(self.successfullyDecryptMessageTimings)
|
|
)
|
|
|
|
def processbroadcast(self, data):
|
|
"""Process a broadcast object"""
|
|
messageProcessingStartTime = time.time()
|
|
state.numberOfBroadcastsProcessed += 1
|
|
queues.UISignalQueue.put((
|
|
'updateNumberOfBroadcastsProcessed', 'no data'))
|
|
inventoryHash = calculateInventoryHash(data)
|
|
readPosition = 20 # bypass the nonce, time, and object type
|
|
broadcastVersion, broadcastVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
readPosition += broadcastVersionLength
|
|
if broadcastVersion < 4 or broadcastVersion > 5:
|
|
logger.info(
|
|
'Cannot decode incoming broadcast versions less than 4'
|
|
' or higher than 5. Assuming the sender isn\'t being silly,'
|
|
' you should upgrade Bitmessage because this message shall'
|
|
' be ignored.'
|
|
)
|
|
return
|
|
cleartextStreamNumber, cleartextStreamNumberLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
readPosition += cleartextStreamNumberLength
|
|
if broadcastVersion == 4:
|
|
# v4 broadcasts are encrypted the same way the msgs are
|
|
# encrypted. To see if we are interested in a v4 broadcast,
|
|
# we try to decrypt it. This was replaced with v5 broadcasts
|
|
# which include a tag which we check instead, just like we do
|
|
# with v4 pubkeys.
|
|
signedData = data[8:readPosition]
|
|
initialDecryptionSuccessful = False
|
|
for key, cryptorObject in sorted(
|
|
shared.MyECSubscriptionCryptorObjects.items(),
|
|
key=lambda x: random.random()):
|
|
try:
|
|
# continue decryption attempts to avoid timing attacks
|
|
if initialDecryptionSuccessful:
|
|
cryptorObject.decrypt(data[readPosition:])
|
|
else:
|
|
decryptedData = cryptorObject.decrypt(
|
|
data[readPosition:])
|
|
# This is the RIPE hash of the sender's pubkey.
|
|
# We need this below to compare to the RIPE hash
|
|
# of the sender's address to verify that it was
|
|
# encrypted by with their key rather than some
|
|
# other key.
|
|
toRipe = key
|
|
initialDecryptionSuccessful = True
|
|
logger.info(
|
|
'EC decryption successful using key associated'
|
|
' with ripe hash: %s', hexlify(key))
|
|
except Exception:
|
|
logger.debug(
|
|
'cryptorObject.decrypt Exception:', exc_info=True)
|
|
if not initialDecryptionSuccessful:
|
|
# This is not a broadcast I am interested in.
|
|
logger.debug(
|
|
'Length of time program spent failing to decrypt this'
|
|
' v4 broadcast: %s seconds.',
|
|
time.time() - messageProcessingStartTime)
|
|
return
|
|
elif broadcastVersion == 5:
|
|
embeddedTag = data[readPosition:readPosition + 32]
|
|
readPosition += 32
|
|
if embeddedTag not in shared.MyECSubscriptionCryptorObjects:
|
|
logger.debug('We\'re not interested in this broadcast.')
|
|
return
|
|
# We are interested in this broadcast because of its tag.
|
|
# We're going to add some more data which is signed further down.
|
|
signedData = data[8:readPosition]
|
|
cryptorObject = shared.MyECSubscriptionCryptorObjects[embeddedTag]
|
|
try:
|
|
decryptedData = cryptorObject.decrypt(data[readPosition:])
|
|
logger.debug('EC decryption successful')
|
|
except Exception:
|
|
logger.debug(
|
|
'Broadcast version %s decryption Unsuccessful.',
|
|
broadcastVersion)
|
|
return
|
|
# At this point this is a broadcast I have decrypted and am
|
|
# interested in.
|
|
readPosition = 0
|
|
sendersAddressVersion, sendersAddressVersionLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 9])
|
|
if broadcastVersion == 4:
|
|
if sendersAddressVersion < 2 or sendersAddressVersion > 3:
|
|
logger.warning(
|
|
'Cannot decode senderAddressVersion other than 2 or 3.'
|
|
' Assuming the sender isn\'t being silly, you should'
|
|
' upgrade Bitmessage because this message shall be'
|
|
' ignored.'
|
|
)
|
|
return
|
|
elif broadcastVersion == 5:
|
|
if sendersAddressVersion < 4:
|
|
logger.info(
|
|
'Cannot decode senderAddressVersion less than 4 for'
|
|
' broadcast version number 5. Assuming the sender'
|
|
' isn\'t being silly, you should upgrade Bitmessage'
|
|
' because this message shall be ignored.'
|
|
)
|
|
return
|
|
readPosition += sendersAddressVersionLength
|
|
sendersStream, sendersStreamLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 9])
|
|
if sendersStream != cleartextStreamNumber:
|
|
logger.info(
|
|
'The stream number outside of the encryption on which the'
|
|
' POW was completed doesn\'t match the stream number'
|
|
' inside the encryption. Ignoring broadcast.'
|
|
)
|
|
return
|
|
readPosition += sendersStreamLength
|
|
readPosition += 4
|
|
sendersPubSigningKey = '\x04' + \
|
|
decryptedData[readPosition:readPosition + 64]
|
|
readPosition += 64
|
|
sendersPubEncryptionKey = '\x04' + \
|
|
decryptedData[readPosition:readPosition + 64]
|
|
readPosition += 64
|
|
if sendersAddressVersion >= 3:
|
|
requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = \
|
|
decodeVarint(decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.debug(
|
|
'sender\'s requiredAverageProofOfWorkNonceTrialsPerByte'
|
|
' is %s', requiredAverageProofOfWorkNonceTrialsPerByte)
|
|
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.debug(
|
|
'sender\'s requiredPayloadLengthExtraBytes is %s',
|
|
requiredPayloadLengthExtraBytes)
|
|
endOfPubkeyPosition = readPosition
|
|
|
|
sha = hashlib.new('sha512')
|
|
sha.update(sendersPubSigningKey + sendersPubEncryptionKey)
|
|
calculatedRipe = RIPEMD160Hash(sha.digest()).digest()
|
|
|
|
if broadcastVersion == 4:
|
|
if toRipe != calculatedRipe:
|
|
logger.info(
|
|
'The encryption key used to encrypt this message'
|
|
' doesn\'t match the keys inbedded in the message'
|
|
' itself. Ignoring message.'
|
|
)
|
|
return
|
|
elif broadcastVersion == 5:
|
|
calculatedTag = hashlib.sha512(hashlib.sha512(
|
|
encodeVarint(sendersAddressVersion) +
|
|
encodeVarint(sendersStream) + calculatedRipe
|
|
).digest()).digest()[32:]
|
|
if calculatedTag != embeddedTag:
|
|
logger.debug(
|
|
'The tag and encryption key used to encrypt this'
|
|
' message doesn\'t match the keys inbedded in the'
|
|
' message itself. Ignoring message.'
|
|
)
|
|
return
|
|
messageEncodingType, messageEncodingTypeLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 9])
|
|
if messageEncodingType == 0:
|
|
return
|
|
readPosition += messageEncodingTypeLength
|
|
messageLength, messageLengthLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 9])
|
|
readPosition += messageLengthLength
|
|
message = decryptedData[readPosition:readPosition + messageLength]
|
|
readPosition += messageLength
|
|
readPositionAtBottomOfMessage = readPosition
|
|
signatureLength, signatureLengthLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 9])
|
|
readPosition += signatureLengthLength
|
|
signature = decryptedData[
|
|
readPosition:readPosition + signatureLength]
|
|
signedData += decryptedData[:readPositionAtBottomOfMessage]
|
|
if not highlevelcrypto.verify(
|
|
signedData, signature, hexlify(sendersPubSigningKey)):
|
|
logger.debug('ECDSA verify failed')
|
|
return
|
|
logger.debug('ECDSA verify passed')
|
|
# Used to detect and ignore duplicate messages in our inbox
|
|
sigHash = hashlib.sha512(
|
|
hashlib.sha512(signature).digest()).digest()[32:]
|
|
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersion, sendersStream, calculatedRipe)
|
|
logger.info('fromAddress: %s', fromAddress)
|
|
|
|
# Let's store the public key in case we want to reply to this person.
|
|
sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
fromAddress,
|
|
sendersAddressVersion,
|
|
decryptedData[:endOfPubkeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
|
|
# Check to see whether we happen to be awaiting this
|
|
# pubkey in order to send a message. If we are, it will do the POW
|
|
# and send it.
|
|
self.possibleNewPubkey(fromAddress)
|
|
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersion, sendersStream, calculatedRipe)
|
|
logger.debug('fromAddress: %s', fromAddress)
|
|
|
|
try:
|
|
decodedMessage = helper_msgcoding.MsgDecode(
|
|
messageEncodingType, message)
|
|
except helper_msgcoding.MsgDecodeException:
|
|
return
|
|
subject = decodedMessage.subject
|
|
body = decodedMessage.body
|
|
|
|
toAddress = '[Broadcast subscribers]'
|
|
if helper_inbox.isMessageAlreadyInInbox(sigHash):
|
|
logger.info('This broadcast is already in our inbox. Ignoring it.')
|
|
return
|
|
t = (inventoryHash, toAddress, fromAddress, subject, int(
|
|
time.time()), body, 'inbox', messageEncodingType, 0, sigHash)
|
|
helper_inbox.insert(t)
|
|
|
|
queues.UISignalQueue.put(('displayNewInboxMessage', (
|
|
inventoryHash, toAddress, fromAddress, subject, body)))
|
|
|
|
# If we are behaving as an API then we might need to run an
|
|
# outside command to let some program know that a new message
|
|
# has arrived.
|
|
if BMConfigParser().safeGetBoolean('bitmessagesettings', 'apienabled'):
|
|
try:
|
|
apiNotifyPath = BMConfigParser().get(
|
|
'bitmessagesettings', 'apinotifypath')
|
|
except:
|
|
apiNotifyPath = ''
|
|
if apiNotifyPath != '':
|
|
call([apiNotifyPath, "newBroadcast"])
|
|
|
|
# Display timing data
|
|
logger.info(
|
|
'Time spent processing this interesting broadcast: %s',
|
|
time.time() - messageProcessingStartTime)
|
|
|
|
def possibleNewPubkey(self, address):
|
|
"""
|
|
We have inserted a pubkey into our pubkey table which we received
|
|
from a pubkey, msg, or broadcast message. It might be one that we
|
|
have been waiting for. Let's check.
|
|
"""
|
|
|
|
# For address versions <= 3, we wait on a key with the correct
|
|
# address version, stream number and RIPE hash.
|
|
_, addressVersion, streamNumber, ripe = decodeAddress(address)
|
|
if addressVersion <= 3:
|
|
if address in state.neededPubkeys:
|
|
del state.neededPubkeys[address]
|
|
self.sendMessages(address)
|
|
else:
|
|
logger.debug(
|
|
'We don\'t need this pub key. We didn\'t ask for it.'
|
|
' For address: %s', address)
|
|
# For address versions >= 4, we wait on a pubkey with the correct tag.
|
|
# Let us create the tag from the address and see if we were waiting
|
|
# for it.
|
|
elif addressVersion >= 4:
|
|
tag = hashlib.sha512(hashlib.sha512(
|
|
encodeVarint(addressVersion) + encodeVarint(streamNumber)
|
|
+ ripe
|
|
).digest()).digest()[32:]
|
|
if tag in state.neededPubkeys:
|
|
del state.neededPubkeys[tag]
|
|
self.sendMessages(address)
|
|
|
|
@staticmethod
|
|
def sendMessages(address):
|
|
"""
|
|
This method is called by the `possibleNewPubkey` when it sees
|
|
that we now have the necessary pubkey to send one or more messages.
|
|
"""
|
|
logger.info('We have been awaiting the arrival of this pubkey.')
|
|
sqlExecute(
|
|
"UPDATE sent SET status='doingmsgpow', retrynumber=0"
|
|
" WHERE toaddress=?"
|
|
" AND (status='awaitingpubkey' OR status='doingpubkeypow')"
|
|
" AND folder='sent'", address)
|
|
queues.workerQueue.put(('sendmessage', ''))
|
|
|
|
@staticmethod
|
|
def ackDataHasAValidHeader(ackData):
|
|
"""Checking ackData with valid Header, not sending ackData when false"""
|
|
if len(ackData) < protocol.Header.size:
|
|
logger.info(
|
|
'The length of ackData is unreasonably short. Not sending'
|
|
' ackData.')
|
|
return False
|
|
|
|
magic, command, payloadLength, checksum = protocol.Header.unpack(
|
|
ackData[:protocol.Header.size])
|
|
if magic != 0xE9BEB4D9:
|
|
logger.info('Ackdata magic bytes were wrong. Not sending ackData.')
|
|
return False
|
|
payload = ackData[protocol.Header.size:]
|
|
if len(payload) != payloadLength:
|
|
logger.info(
|
|
'ackData payload length doesn\'t match the payload length'
|
|
' specified in the header. Not sending ackdata.')
|
|
return False
|
|
# ~1.6 MB which is the maximum possible size of an inv message.
|
|
if payloadLength > 1600100:
|
|
# The largest message should be either an inv or a getdata
|
|
# message at 1.6 MB in size.
|
|
# That doesn't mean that the object may be that big. The
|
|
# shared.checkAndShareObjectWithPeers function will verify
|
|
# that it is no larger than 2^18 bytes.
|
|
return False
|
|
# test the checksum in the message.
|
|
if checksum != hashlib.sha512(payload).digest()[0:4]:
|
|
logger.info('ackdata checksum wrong. Not sending ackdata.')
|
|
return False
|
|
command = command.rstrip('\x00')
|
|
if command != 'object':
|
|
return False
|
|
return True
|
|
|
|
@staticmethod
|
|
def addMailingListNameToSubject(subject, mailingListName):
|
|
"""Adding mailingListName to subject"""
|
|
subject = subject.strip()
|
|
if subject[:3] == 'Re:' or subject[:3] == 'RE:':
|
|
subject = subject[3:].strip()
|
|
if '[' + mailingListName + ']' in subject:
|
|
return subject
|
|
return '[' + mailingListName + '] ' + subject
|